Electric lock.



No. 757,050. P T 'NTED AUG. 9, mm.

A. HABSNEB. ELECTRIC L003.

L'I'PLIDATIU! FILED JULY 1. 1-103.

30 KOBE!- QXX famous v Patented Angvnvt 9, 1904.

PXTEJT OFFICE.

E LEGTFHC) LOCK- SPEGIFiCATION forming part of Letters Patent No. 767,050, dated August 9, 1904.

Application iiledluly i. was.

T 0 all whom it may r-onm'rrn- Be it known that l. Anna-nan? ital-Issac. a eitizcn'of Germany, residing at Munich. Bavaria.(icrmaavdmve invented certain new and useful Improvements in Electric Locks: andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in thcart to which it appertains to make and use the same.

My invention relates to improvements in electric locks. v

The objects of my invention are to provide a lock which will permit the door to be hacked and unlocked from a distance, which wili indicate the condition of the lock, as to whether locked or unlocked, and which will allow the look after once being unlocked to be again locked without nccessitatin the intermediate opening and closing of the (1001'.

With thisgcncral object in view and some others which will be obvious to those shiilcd in the art from the description hereinafter. my invention consists in the general combination of elements, as well as the details of construction, which will lirst be described in connection with my preferred embodiment of the invention and then particularly pointed out in the claims, it being understood that many changes may he made in the structure specifically described hercii'mt'ter without departing from the spirit of my invention.

in the drawings, Figure 1 is a plan view of the preferred form of lock mechanism, showing it in the locking position. Fig. 2 is a similar view of the same in the unlocked position; Fig. 3, a side elevation of said lock mechanism looking from the inside of the door. and

Fig. 4 a diagrammatic view of the electric circuits. Fig. 5 is adetaii view of the armature-spindle and the tun1hler-shaft taken apart.

Referring to the drawings, 0 is an armaturespindle pivotally mounted in the lock-casing 1), one end, of said spindle being reduced in diameter. Upon this reduced end is mounted a tubular tumbler-shaft u, the said tumblersha-ft and the armature-spindle n being interlocked with each other by overlapping jaws If, which, however, do not littogether tightly, av small space a being left between Serial No 163,969. (No match! them to permit a limited amount of rotation of the tumhlcrshat't 0' upon the armature spindle u. The tumblcr-slmft is provided with a radial pin a, to which is secured one end of a coiled spring-n, having one end extended to engage and press against a radial pin 0', secured in the armature-s nindle 1. Upon this armatnre'spindle n is fixed a comwmind polarized armature a! circular in general outline, its cut-away portion serving-t0 receive a polepiece a of an clectromagnet v, the terminals of whose coilsarc indicated at a and v The latter terminal, v, is connected to one end of a springan'm iv, secured to the leek-casing, but insulated therefrom by an insulating-block The said spring-arm mirmallv presses against a contact-post 1', and the free end of said spring-arm beyond the contact-post is bent in the direction toward which the door opens. At the extreme end of the springarm is secured an insulating-plate 1:.

Upon the tumbler-shaft 0' is fixed a tumbler 1, which has the form of a disk with one side cut away, as shown in Figs. 1 and 2. This tumbler is arranged to engage one end of a detent-arm 1:, which is fixed to a rotary detent rr, having a recess to receive the usual spring-actuated bolt (1', Fig. 1, that part of the detent which engages the inside of the spriug-lmlt a when the door is being closed being somewhat extended, as shown at f, Figs. 1 and 2. The rotary dctent I is fixed on an axis :1", pivoted in the lochcasing, which axis is surrounded by a coiled spring a, connected atonecnd to the loclecasing and at the other end to the rotary detent, as shown in Fig. 3, the tendency of this spring being to rotate the detent a to the position shown in ig. 2.

The circuit connections are as follows, reference being had to Fig. 4: The terminal cof the electromagnet is connected to the positive pole of a battery I: and also to the negative pole of a battery a by a conductor m. suitable circuit-brealcing mechanism being inchided in this conductor, so that the line will be open when the door is open. The specific construction of such a circuit-breaker constitutes no part of the present invention and is not described, but is indicated at a, Fig. 4.

Q romeo Jtt the point from which the lock is to be controlled are placed two circuit-closing dcvices. as keya or puahdaattona. (indicated at it and A. Fig. 4.) One side of the key ii is I connected by a condtwtor m to the wait-ire pole of the hatter-y a. which pole is nlnoeonnet-ted to the rotary detcnt n of the lock, preferably hy a hranch conductor in". leadiny Irom the conductor m spring: o. The key 1i" has one sideconnected by a conductor m to the negative pole of the battery 11. The remaining sides ofthe keys 1- and l" are connected jointly by a conductor m to the contact-post i of the lock. this conductor including the coil of an anuunciator m'. which is provided with a polarized armature. so that a current in. one direction through the coil will more the armature in one way. while a current in the opposite dircction will move the armature in the opposite way. Such annunciatora or indicators are old and well known and need no further description herein.

The operation of the mechanism is" as follows: Assniming; that the door is locked, the parts have the positions shown in Fig. 1,' wherein the detent-a-rm' I: is shown as resting upon the tmnblerrgwherehy it is impon ible'to rotate the rotary detcnt to free the spring-bolt rr', thereby preventing, the door from being opened merely by pulling the door. If new the key 1" be pressed, an electric circuit will be closed as follows: from the positive pole of battery n, over conductor m, through the closed circuitbreaker Hand the coil of theelectromagnetc, to the spring-arm It, thence alone. said springarm to the contacbpost i. and from the re along the conductor in, through the coil of the an nunciator m, to the closed key I", and from there back to the negative pole of battery it over conductor in. The action of the current over this circuit is to energize the electromagnet 1:, so as to attract and thereby r0- tate the armature (I to the position shown in Fig. 2. thus turning the tumbler 1: so that it clears the end of the arm 5, whereby said arm is free to swing through the cut-away portion of the tumbler, which it tends to do under. the influence of the spring 11 being restrained merely because of the inertia of the door and the friction to be overcome in opening the door. At the name time with the operation of the lock mechanism to unlock the door the annunciator or indicator in is operated to indicate that the door is unlocked. If now the door is opened by hand in the usual way, the

rotary dctcntis moved toward the position shown. in Fig. 2, and in so moving its pin g is brought into contact with the spring-arm It, thus pushing the spring-arm away from the contact-post 2' and opening the circuit which has been described above. At the same time the engagement of the pin g with the springto the lot-looming. i with which the rotary detent 1:4 in good electrical connection through its axis a and the r l arm ll closes another electric circuit as lol i lows: from the po itive pole in the Matter) n', over a part of conductor m and over hranch conductor m to the l ck-casing, and thence l to the rotary dctrnt '1. its nrln and the pin 1;- From the pin the current prmwu duriny, l the contact of the pin with the sprimrarm it to the said eprinwarm and through the coil of the elcctromagnet w". from whence it returns l to the negative pole of hatter-y a over coni doctor m, passing t hrmnrl: the. spring circuitj hreakcr n, which is still closed. lwwiuse of l the fact that the pin 5) reaches the aprin parm /a before the door has heeu moved autliciently to open the sprin circuit-l eaker a. As the eurrent'ovcr the circuit just described traverses the coil of the electronnnruet in a threetion rereme to the first current the armature (I is moved hack to its lirst. imsition. {shown in Fig. 1,) carrying with itthe tumbler r. The continued movement of the door in opening,'

Fig. 2.) wherein its pin 9 comes into contact with and rests upon the insulating-plate It, thus breaking the circuit just described be tween the pin and the spring-arm It. Also owing to the opening of the door all circuits through the lock are hroken by the owning of the circuit-breaker a". When now the door isae'ain cloned, the am-iugpholto' will first. strike the nosef'. which, as before descrilmd. projects to a coneiderable extent from the rotary detent. In this way the latter is moved against the tension of the springa to the position shown in Fig. 1, the arm 71 forcing itself past the tumbler c, which yields suiliciently to permit this, and immediately springs back under the said arm 7/, thisyichling of the tumbler and its return to the normal locking position heing permitted owing to the yielding connection of the tumblershaft 0' to the armature-shaft n, the spring o allowing the tumblcr-ahaft tohe rotated backward to a slight extent and then returninn, said shaft to ita normal position. If after the key 11'' has been pressed to unlock the door, as hcreinheforc explained. it is then desired to lock the door again the keyll' may be pressed. which, it the door be shut. closes a circuit as follows: from the positive pole of battery a, over conductor m, through kcyl', ,nnnunciator m, over conductor in, the coil of the electromagnet e, through the closed sprin circuitbreaker a. and back to the negative pole of battery 22', over conductor in. Since the current over this circuit passes through the annunciator-coil in a direction re verse to that of the current which unlocks the door, it will operate said annunciator to indicate that the door is locked. If, however, the door is not shut, the circuit just described cannot be closed by the key 1'. since the epring circuit-breaker n will be open and thespringarm L will not be in contact with the contact.-

linally permits and causes the rotary dctent. n to move to its extreme position. (shown in-- pest because of the fact that said apringrarm is held away l'r'era the 1105i i by the-pincondition of the door when the same in open by moving: the rutargr detcnt by hand to its locking: position.

' Uwingto the fact that a polariaed armature is employedthat is tn Ray. :n armature which in a litlltltttttt'ti. magnet the ur c of springs. detcnt device. or the like for iuildiiu: said armature in either extreme poaitinn is avoided. because eaid armature. being: a magnet. will stick to the wile-piece e cf the electromagnet in either Weition to which it is thrown. Moreover. the use of the polarized armature result:- in a lieaitirc action in loci:-

in r and unlocking the det-ent.

Having than fully dcncrihed my invention. what I claim as new, and desire to secure In Letters- Patent. i5

1. in an electric lock. the comhinatinn. with an electrotuagiwt. and means for supplying currents of opposite rmlarity to aaid electronnurnet, oi a polarized armature operated by said electrun-attract. a. detent arranged to hold the door. and mechaniran operated by the polarizcd armature and arranged to lock and unlock the detent.

2. in an electric loch. thecombination. with an electromagnet. a detent arranged to hold the door, a polarized armature operated by the electromagnct. tl'ttent-lncltihtf means. 0p

by t'hedetent and arranged to supply tn the electruntagnet a current of polarity opposite to the tire-t-mentinnial current.

4'. in an electric hit-h, the cumbinatiuu, with a detent arranged to held the door. a tumbler arranged to incl-i mid detent and an armature arranged to more said tumbler. ut' an ele trtrmagnet arranged to operate the aramture, and a yielding connect-ital attached to the armature and to the tumbler.

5. In an electric luck. the eoluhinatinn, with a detent arranged to hold the door. an armatureepimlle. and armature mounted thereuu. and an f lecltfllltttijllvi arranged to actuate the armature. of a ttltttlilPf-Fllttfl nmuntedcn the urniaturwspindle. a tnmhler carried hy said tuud ler'shat't andarmngzed to luck the detent, and a resilient connection between said tune hler-ahait and the armatarc-spindle.

6. in an electric lock. the combination, with a detent arranged to held the door and pru- \ided with a detentau'm. detent-loekim! means for locking: said detect-arm. an electromamict a 'rrangcd to operate said dctcn t-lucltin means, a spring-arm connected to one terminal of the clectronaurnet and arranged to he moved by the detent. a contact device arranged to engage the apriiur-armfa circuit including the electroma xnet and the contact device, a HUGO! circuit including: the tlttttltlrlt'tlll and the electromaunct. means for supplying current of one polarity to the lirr-zt circuit, and memes for supplying current of opposite polarity t0 the second circuit.

7. in an electric lock. the comhinatien, with locking, said detent. a polarized armature arranged to actuate Httltl means, and a pair of circuits lnchahngthc elcctromagnet, of means fur supplying tosaid circuits current of upper Witnesses:

Roman lineman, Srrrnmm-m Mara. 

